Press the Next button again and again to see that there are 3 resource config pages in the Node Editor, which is the panel between the Tree View and the Whiteboard. Resource Config Page 1 is labelled as 'Suggested Code'.
On the Resource Config Page 2, choose NO for Navigation only. If YES, the Generate button will generate HTML and wiki codes only for the navigation bar.
Press the Next button to view the Resource Config Page 3.